Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 3

EASY

12th Telangana Board

IMPORTANT

Earn 100

A charged rod $P$ attracts another charged rod $R$ while it repels another charged rod $Q$ . What will be the nature of force developed between $Q$ and $R$ ?

Important Questions on Electric Charges and Fields

EASY

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 4

A copper sphere of

2 g

contains

2 \times 10^{22}

atoms. The nucleus of each atom has a charge of

29 e

. What fraction of electrons should be removed from the sphere to give it a charge of

2 μC

? Take,

e = 1.6 \times 10^{- 19} C

MEDIUM

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 5

A thick chain hangs from a petrol or a diesel tanker and it is in contact with ground when the tanker is moving.

EASY

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 6

Two small spheres 18cm apart have equal negative charges and repel each other with the force

6 \times 10^{- 8} N

. Find the total charge on two spheres.

EASY

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 7

Two charged particles having charge

2 \cdot 0 \times 10^{- 8} C

each are joined by an insulating string of length

1 m

and the system is kept on a smooth horizontal table. Find the tension in the string.

EASY

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 8

How will you show that electric charges are of two types?

HARD

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 9

Two small sphere, each having a mass of

20 g

, are suspended from a common point by two insulating strings of length

40 cm

each. The spheres are identically charged and the separation between the balls at equilibrium is found to be

4 cm

. Find the charge on each sphere.

EASY

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 10

A particle having a charge of

2.0 \times 10^{- 4} C

is placed directly below and at a separation of

10 cm

from the bob of a simple pendulum at rest. The mass of the bob is

100 g

. What charge should the bob be given so that the string becomes loose?

EASY

12th Telangana Board

IMPORTANT

Physics Crash Course (Based on Revised Syllabus-2023)>Chapter 4 - Electric Charges and Fields>Exercise>Q 11

On what the value of

k

depends in the expression

k = \frac{1}{4 π ε_{o}}

for coulomb's law?